My aerial is also on the lower main part of the ARB bar, not on a high mount tab.
Weight is about the same as what gets taken off and with the added bonus of a front protection plate underneath.
I got a winch bar so I could fit a winch later if I wanted and the hole has several layers of black plastic gutter guard ($2 from bunnings) to stop small birds and rocks but allow air flow which is important to me for towing the van.
Ryall

